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関連する概念動画

Osmoregulation in Fishes02:32

Osmoregulation in Fishes

When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
Aquaporins01:25

Aquaporins

Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

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Molecular structure of a hyperactive antifreeze protein adsorbed to ice.

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Renal corpuscle development in boreal fishes with and without antifreezes.

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関連する実験動画

Updated: Jul 11, 2026

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
14:38

Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

Published on: April 20, 2012

南極魚のアグロメルーラリズム

G H Dobbs, Y Lin, A L DeVries

    Science (New York, N.Y.)
    |August 30, 1974
    PubMed
    まとめ

    南極の骨魚は,グルメルーラフィルタレーションなしに尿を形成し,アグルメルーラリズムと呼ばれるプロセスです. この腎臓の適応は,必要不可欠な生物学的アンチフリーズタンパク質の喪失を防ぐ可能性が高い.

    科学分野:

    • 生理学 生理学とは
    • 動物学 動物学
    • マリン・バイオロジー マリン・バイオロジー

    背景:

    • 南極の骨魚は,極端に寒い環境に住んでいます.
    • 腎臓の機能は,脊椎動物のオスモレギュレーションと廃棄物の排泄に不可欠です.

    研究 の 目的:

    • 南極の骨魚の尿形成のメカニズムを調査するために.
    • これらの魚の腎臓でグルメルーラフィルタレーションが発生するかどうかを判断するために.

    主な方法:

    • 連続した腎臓切断の光顕微鏡検査.
    • 尾関節注射後の炭素14で表記されたイヌリンの分泌量の測定.

    主要な成果:

    • 直接観察により,魚の腎臓にグルメルーリがないことが確認されました.
    • 排泄されたイヌリンの低濃度は,球の濾過が欠けていることを示した.

    結論:

    • 南極の骨魚は,アグロメルーラ型腎臓を持っています.
    • アグロメルーラリズムは,重要な抗凍結グリコプロテインの損失を防ぐための適応である可能性が高い.

    さらに関連する動画

    LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations
    09:32

    LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations

    Published on: February 4, 2013

    Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
    08:46

    Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

    Published on: January 15, 2014

    関連する実験動画

    Last Updated: Jul 11, 2026

    Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
    14:38

    Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential

    Published on: April 20, 2012

    LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations
    09:32

    LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations

    Published on: February 4, 2013

    Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
    08:46

    Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

    Published on: January 15, 2014